CN113481509A - Anti-sticking tool and machining method thereof - Google Patents

Abstract

The invention discloses an anti-sticking tool machining method, which comprises the following steps: forming a protective film on the surface of the cutter blank, etching to form a decorative pattern, removing the protective film, performing sand blasting, oxidizing and cleaning to obtain an anti-sticking cutter finished product. Correspondingly, the invention also discloses an anti-sticking cutter. By implementing the invention, fine decorative lines can be formed on the surface of the cutter, and the anti-sticking performance and the decorative function of the cutter are improved.

Description

Anti-sticking tool and machining method thereof

Technical Field

The invention relates to the technical field of cutter processing, in particular to an anti-sticking cutter and a processing method thereof.

Background

The daily-used knife comprises a kitchen knife and a fruit knife, and the basic structures of the knife are a knife handle and a knife body. The cutter body can be made of steel, ceramics and the like. Most commonly steel. The knife body is generally flat, and the knife body is easy to stick on a cut object in the using process; or adhere to other cutters after being wetted, thereby causing inconvenience in use.

The common solution is to provide a plurality of circular and square grooves on the surface of the cutter body to improve the anti-sticking performance. But this structure is not aesthetically pleasing. In the leveling procedure of cutter body preparation, the Chinese patent CN201410238055.6 adopts a leveling mold with lines to level, so that the lines are prepared on the surface of the cutter body, and the anti-sticking effect is achieved; but it is formed at a higher temperature, resulting in poor pattern accuracy and poor decoration.

Disclosure of Invention

The invention aims to solve the technical problem of providing an anti-sticking tool machining method, wherein the machined tool is excellent in anti-sticking performance and outstanding in decorative effect.

The invention also aims to solve the technical problem of providing an anti-sticking cutter.

In order to solve the technical problem, the invention provides an anti-sticking tool machining method, which comprises the following steps:

(1) providing a cutter blank;

(2) forming a protective film on the surface of the cutter blank;

(3) etching the cutter blank obtained in the step (2) to form a decorative pattern in a region not covered by the protective film;

(4) cleaning to remove the protective film;

(5) carrying out sand blasting treatment on the cutter blank with the decorative pattern;

(6) oxidizing the cutter blank subjected to sand blasting to form an oxide layer to obtain an intermediate product;

(7) and cleaning the intermediate product to obtain a finished cutter.

As an improvement of the technical scheme, in the step (2), printing ink is printed on the surface of the cutter blank by adopting a screen printing process to form a protective film;

in the step (3), etching the cutter blank by adopting an acid solution; wherein the acidic solution is hydrochloric acid solution, sulfuric acid solution or FeCl₃And (3) solution.

As an improvement of the technical scheme, in the step (3), the acidic solution is FeCl₃A solution having a concentration of 40 to 50 wt%;

the etching temperature is 20-40 ℃, and the etching depth is 0.08-0.2 mm.

As an improvement of the technical scheme, in the step (5), the pressure intensity of sand blasting treatment is 0.2-0.4 MPa;

the abrasive material adopted by the sand blasting treatment is pearl sand, and the granularity of the pearl sand is 200-240 meshes.

As an improvement of the technical scheme, in the step (6), the cutter blank subjected to sand blasting treatment is immersed in an oxidizing solution to form an oxide layer;

the oxidizing solution contains ferrous phosphate and nitric acid.

As an improvement of the technical proposal, in the oxidizing solution, Fe₃(PO₄)₂10-20 wt% of HNO₃The concentration of (A) is 35-40 wt%.

As an improvement of the technical scheme, the step (4) comprises the following steps:

(4.1) cleaning by using an alkaline degreasing agent solution to remove the protective film;

(4.2) polishing the cutter blank;

and (4.3) cleaning the cutter blank by adopting water.

As an improvement of the technical scheme, the step (1) comprises the following steps:

(1.1) providing a cutter blank;

(1.2) carrying out coarse grinding, fine grinding and polishing treatment on the cutter blank body in sequence;

and (1.3) cleaning the cutter blank by adopting water.

As an improvement of the above technical solution, the method further comprises:

(8) a ceramic protective layer is formed on the surface of the cleaned intermediate product.

Correspondingly, the invention also discloses an anti-sticking tool which is processed by the anti-sticking tool processing method.

The implementation of the invention has the following beneficial effects:

1. the invention adopts the etching process to prepare the decorative pattern on the surface of the cutter blank, has high process precision, can form fine grains (such as Damascus grains) on the surface of the cutter blank, and can effectively improve the decorative effect while playing the anti-sticking effect.

2. According to the invention, etching is carried out before sand blasting, and the decorative pattern obtained by etching is effectively treated in the sand blasting process, so that the decorative pattern is fully oxidized in the subsequent oxidation process, the defects of white spots and the like are avoided, the cutter is easy to clean, and the antirust effect is good.

Drawings

FIG. 1 is a flow chart of a method of anti-sticking tool machining according to the present invention;

FIG. 2 is a schematic view showing the structure of an anti-sticking cutter in example 2 of the present invention;

fig. 3 is a real object diagram of the anti-sticking tool in example 4 of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the present invention provides an anti-sticking tool machining method, which includes the steps of:

s1: providing a cutter blank;

specifically, S1 includes:

s11: providing a cutter blank;

s12: carrying out coarse grinding, fine grinding and polishing treatment in sequence;

the method comprises the following steps of (1) carrying out rough grinding on a cutter blank by adopting a grinding wheel to form a V-shaped cutter edge; water is introduced during the coarse grinding process to prevent the temperature from being too high.

And the rough ground cutter blank is finely ground by using a rubber grinding wheel, and water is introduced in the fine grinding process to prevent the temperature from being too high.

Wherein, the finely ground cutter blank is ground by a hemp wheel, a cloth wheel and wax in sequence to realize polishing.

S13: cleaning the cutter blank by using water;

specifically, the tool blank is cleaned by hot water at the temperature of 50-80 ℃.

S2: forming a protective film on the surface of the cutter blank;

specifically, the protective film is a substance that is not corroded in an acidic solution, and may be exemplified by ink, polyolefin, polytetrafluoroethylene, and the like, but is not limited thereto. Preferably, the protective film is made of ink which is easy to obtain, easy to remove at a later stage and easy to apply to the surface of the cutter blank at normal temperature.

The forming process of the protective film may be screen printing, inkjet printing, but is not limited thereto. Preferably screen printing, which has high printing precision, can form high-precision decorative patterns and has low cost.

S3: etching the cutter blank obtained in the step S2;

wherein, the tool blank body can be etched by adopting a dry etching process and a wet etching process. Preferably, the tool blank is etched using a wet etching process. Specifically, the tool blank is etched by using an acidic solution.

The acid solution used for etching can be dilute hydrochloric acid solution, dilute sulfuric acid solution or FeCl₃But is not limited thereto. Preferably, FeCl is used₃The solution is used for etching, and the process is stable, convenient to operate and low in cost. FeCl₃The concentration of the solution is 40-50 wt%, and when the concentration is less than 40 wt%, Fe³⁺The Fe in the cutter blank is difficult to combine with Fe effectively in time, and the etching speed is slow; fe when its concentration is > 50 wt%³⁺Fe obtained by reaction with Fe²⁺The etching solution is difficult to diffuse into the etching solution quickly, and the etching speed is slow. Exemplary, FeCl₃Is 41 wt%, 43 wt%, 45 wt% or 48 wt%, but is not limited thereto.

During the etching process, the temperature is controlled to be 20-40 ℃, and exemplary temperatures are 23 ℃, 25 ℃, 28 ℃, 30 ℃, 33 ℃ or 35 ℃, but not limited thereto.

After etching, the etching depth is 0.08-0.2 mm. When the etching depth is less than 0.08mm, the sand blasting process can influence the precision of the decorative pattern formed by etching; when the etching depth is more than 0.2mm, the end face formed by etching is difficult to blast, an oxide film is difficult to form, and the defect of white spots is exhibited, while the corrosion resistance and the antibacterial property of the cutter in this region are also lowered. Illustratively, the etching depth is 0.09mm, 0.1mm, 0.11mm, 0.14mm, 0.16mm, or 0.19mm, but is not limited thereto.

S4: cleaning to remove the protective film;

specifically, S4 includes:

s41: cleaning with alkaline degreasing agent solution to remove the protective film;

specifically, the alkaline degreasing agent solution is adopted for cleaning, one of the alkaline degreasing agent solution and the protective film can remove organic matters such as grease and the like on the surface of the cutter blank, and the three can neutralize the acid solution in the etching process.

Specifically, the pH of the alkaline degreasing agent solution is 10-12, and is exemplarily 10.4, 10.7, 11, 11.5 or 11.9, but is not limited thereto.

S42: polishing the cutter blank;

specifically, a rough wheel, a cloth wheel and wax are sequentially adopted to polish the finely ground cutter blank so as to realize polishing.

S43: and cleaning the cutter blank by using water.

Specifically, the tool blank is cleaned by hot water at the temperature of 50-80 ℃.

S5: carrying out sand blasting treatment on the cutter blank with the decorative pattern;

the bonding force between the oxide layer and the cutter blank can be improved through sand blasting. Specifically, the pressure intensity of the sand blasting treatment is 0.2-0.4 MPa, and the grinding material adopted by the sand blasting treatment is pearl sand with the granularity of 200-240 meshes.

The invention places the sand blasting process after the etching process, so that the grain edge formed by etching can be well treated in the sand blasting process, thereby forming a good oxidation protection film at the later stage.

It should be noted that the etching depth is not too large, which is limited by the thickness of the blade. Therefore, if a conventional sand blasting process is used, it is possible to directly remove the pattern formed by etching. If the sandblasting process is not performed or the pressure of the sandblasting process is greatly reduced, the etching pattern may not be effectively processed, thereby affecting the subsequent oxidation process. For this reason, in the present invention, the pressure of the blasting treatment is controlled to be 0.2 to 0.4MPa, and exemplary pressure is 0.22MPa, 0.25MPa, 0.3MPa, 0.33MPa, or 0.38MPa, but not limited thereto. In addition, the grinding material adopted by the invention is pearl sand which is the grinding material after perlite is crushed, the hardness of the grinding material is smaller (less than or equal to 6), and the damage to the etching pattern is smaller. Furthermore, the granularity of the abrasive is controlled to be 200-240 meshes, the abrasive in the granularity range can better process the surface of the cutter blank and the edge of an etched pattern, the defects such as white spots are prevented, and the oxidation quality is improved. Illustratively, the abrasive has a particle size of 200 mesh, 220 mesh, or 240 mesh, but is not limited thereto.

S6: oxidizing the cutter blank subjected to sand blasting to form an oxide layer to obtain an intermediate product;

specifically, the tool blank after sand blasting is immersed in an oxidizing solution to form an oxide layer.

Wherein the oxidizing solution is a mixed solution of ferrous phosphate and nitric acid, specifically, Fe₃(PO₄)₂The concentration is 10 to 20 wt%, exemplary 12 wt%, 13 wt%, 15 wt%, or 18 wt%, but is not limited thereto. HNO₃Is 35 to 40 wt%, exemplary is 36 wt%, 37 wt%, 38 wt% or 39 wt%, but is not limited thereto.

S7: cleaning the intermediate product;

specifically, the intermediate product is cleaned by hot water at the temperature of 50-80 ℃.

Preferably, the anti-sticking tool machining method further comprises the following steps:

s8: forming a ceramic protective layer on the surface of the intermediate product to obtain an anti-sticking cutter finished product;

specifically, S8 includes:

s81: demagnetizing or demagnetizing the cleaned intermediate product;

s82: purging the surface of the intermediate product;

s83: and spraying ceramic paint on the surface of the intermediate product, heating for solidification, and cooling to obtain the anti-sticking cutter finished product.

Correspondingly, the invention also discloses an anti-sticking cutter which is processed by adopting the processing method.

The invention is illustrated below in specific examples:

example 1

The embodiment provides a machining method of an anti-sticking tool, which comprises the following steps:

(1) providing a cutter blank;

(2) screen printing a protective film on the surface of the cutter blank;

(3) etching with dilute hydrochloric acid solution (10 wt%) for 3 min;

(4) cleaning with NaOH solution to remove the protective film;

(5) sand blasting, wherein the sand blasting pressure is 0.2MPa, and the grinding material is 240-mesh pearl sand;

(6) oxidizing by using nitric acid with the concentration of 40 wt%;

(7) cleaning with 50 deg.C water.

Example 2

The embodiment provides a machining method of an anti-sticking tool, which comprises the following steps:

(1) providing a cutter blank;

(2) screen printing a protective film on the surface of the cutter blank;

(3) using FeCl₃Etching the solution (40 wt%) at 30 deg.C to an etching depth of 0.08 mm;

(4) cleaning by using a degreasing agent solution to remove the protective film; polishing the cutter, and cleaning with 50 deg.C water;

(5) sand blasting, wherein the sand blasting pressure is 0.3MPa, and the grinding material is 220-mesh pearl sand;

(6) oxidizing by using oxidizing liquid, in which Fe is contained₃(PO₄)₂Concentration of 11 wt%, HNO₃The concentration of (B) is 36 wt%.

(7) Washing with water at 50 deg.C;

(8) spraying ceramic paint, and heating and curing to obtain the product.

Example 3

The embodiment provides a machining method of an anti-sticking tool, which comprises the following steps:

(1) providing a cutter blank;

(2) screen printing a protective film on the surface of the cutter blank;

(3) using FeCl₃Etching the solution (45 wt%) at 25 deg.C to an etching depth of 0.12 mm;

(4) cleaning by using a degreasing agent solution to remove the protective film; polishing the cutter, and cleaning with 55 deg.C water;

(5) sand blasting, wherein the sand blasting pressure is 0.22MPa, and the grinding material is pearl sand of 200 meshes;

(6) oxidizing by using oxidizing liquid, in which Fe is contained₃(PO₄)₂Concentration 15 wt%, HNO₃The concentration of (B) is 36 wt%.

(7) Washing with water at 55 deg.C;

(8) spraying ceramic paint, and heating and curing to obtain the product.

Example 4

The embodiment provides a machining method of an anti-sticking tool, which comprises the following steps:

(1) providing a cutter blank;

(2) screen printing a protective film on the surface of the cutter blank;

(3) using FeCl₃Etching the solution (43 wt%) at 30 deg.C to an etching depth of 0.2 mm;

(4) cleaning by using a degreasing agent solution to remove the protective film; polishing the cutter, and cleaning with 55 deg.C water;

(5) sand blasting, wherein the sand blasting pressure is 0.4MPa, and the grinding material is 230-mesh pearl sand;

(6) oxidizing by using oxidizing liquid, in which Fe is contained₃(PO₄)₂Concentration 18 wt%, HNO₃The concentration of (B) was 37 wt%.

(7) Washing with water at 55 deg.C;

(8) spraying ceramic paint, and heating and curing to obtain the product.

Comparative example 1

The present comparative example provides a method of machining a tool, including:

(1) providing a cutter blank;

(2) sand blasting, wherein the sand blasting pressure is 0.2MPa, and the grinding material is 240-mesh pearl sand;

(3) screen printing a protective film on the surface of the cutter blank;

(4) etching with dilute hydrochloric acid solution (10 wt%) for 3 min;

(5) cleaning with NaOH solution to remove the protective film;

(6) oxidizing by using nitric acid with the concentration of 40 wt%;

(7) cleaning with 50 deg.C water.

Comparative example 2

This comparative example differs from example 4 in that quartz sand was used as the abrasive.

Comparative example 3

This comparative example is different from example 4 in that the pressure of the blasting treatment was 0.5 MPa.

Comparative example 4

This comparative example differs from example 4 in that the oxidizing solution was Fe (H)₂PO₄)₂Solution (40 wt%).

Comparative example 5

This comparative example differs from example 4 in that the etching depth was 0.3 mm.

The anti-sticking tools of examples 1 to 4 and comparative examples 1 to 5 were tested according to the method of the relevant standard (plan No. 20130943-T-607) and the results were as follows:

as can be seen from the table, the anti-sticking cutter has clear decorative lines, black surface, strong decorative effect and excellent corrosion resistance. As can be seen from the comparison between example 4 and comparative examples 1 to 4, if the sequence of the processing method or the process parameters of each process in the invention are changed, the technical effect of the invention cannot be achieved.

The above description is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.

Claims (10)

1. An anti-sticking tool machining method is characterized by comprising the following steps:

(1) providing a cutter blank;

(2) forming a protective film on the surface of the cutter blank;

(3) etching the cutter blank obtained in the step (2) to form a decorative pattern in a region not covered by the protective film;

(4) cleaning to remove the protective film;

(5) carrying out sand blasting treatment on the cutter blank with the decorative pattern;

(6) oxidizing the cutter blank subjected to sand blasting to form an oxide layer to obtain an intermediate product;

(7) and cleaning the intermediate product to obtain a finished cutter.

2. The anti-sticking tool processing method as claimed in claim 1, wherein in the step (2), ink is printed on the surface of the tool blank by a screen printing process to form a protective film;

in the step (3), etching the cutter blank by adopting an acid solution; wherein the acidic solution is hydrochloric acid solution, sulfuric acid solution or FeCl₃And (3) solution.

3. The anti-sticking tool machining method according to claim 2, characterized in that in step (3), the acidic solution is FeCl₃A solution having a concentration of 40 to 50 wt%;

the etching temperature is 20-40 ℃, and the etching depth is 0.08-0.2 mm.

4. The anti-sticking tool machining method according to claim 1, characterized in that in the step (5), the pressure of the blasting treatment is 0.2 to 0.4 MPa;

the abrasive material adopted by the sand blasting treatment is pearl sand, and the granularity of the pearl sand is 200-240 meshes.

5. The sticking-resistant tool machining method according to claim 1, wherein in the step (6), the tool blank after the sand blasting is immersed in an oxidizing liquid to form an oxide layer;

the oxidizing solution contains ferrous phosphate and nitric acid.

6. The anti-sticking tool machining method according to claim 5, characterized in that in the oxidizing solution, Fe₃(PO₄)₂10-20 wt% of HNO₃The concentration of (A) is 35-40 wt%.

7. The sticking-resistant tool machining method according to claim 1, wherein the step (4) includes:

(4.1) cleaning by using an alkaline degreasing agent solution to remove the protective film;

(4.2) polishing the cutter blank;

and (4.3) cleaning the cutter blank by adopting water.

8. The sticking-resistant tool machining method according to claim 1, wherein the step (1) includes:

(1.1) providing a cutter blank;

(1.2) carrying out coarse grinding, fine grinding and polishing treatment on the cutter blank body in sequence;

and (1.3) cleaning the cutter blank by adopting water.

9. The anti-sticking tool machining method according to claim 1, further comprising:

(8) a ceramic protective layer is formed on the surface of the cleaned intermediate product.

10. An anti-sticking tool, which is obtained by the anti-sticking tool machining method according to any one of claims 1 to 9.

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